It won't be free. The number of images on Facebook blew past 10
billion over a year ago. The old photos won't get any bigger, of
course, but this move will increase the company's already massive
storage costs going forward.

But those are costs Facebook is happy to take on. And it's not
the only improvement Facebook has made to its photo service
semi-recently: Users have always been able to upload as many
photos as they want, but until recently there was a cap of 60
photos in any one album. That limit was increased to 200 last
spring.